局域网QQ(C#版)

80酷酷网    80kuku.com

  

本通讯程序没有服务端和客户端之分,局域网的计算机运行同一程序即可通信。
由于水平有限,目前版本还很菜,只可以实现基本的聊天功能和显示在线用户功能。
准备添加传送文件、聊天日志、可选参数等功能。
  using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;

namespace myQQ
{
 /// <summary>
 /// Form1 的摘要说明。
 /// </summary>
 public class Form1 : System.Windows.Forms.Form
 {
  public bool runing=false; //标志
  public UdpClient listen=new UdpClient(2525);
  public IPEndPoint End;
  public IPAddress groupAddress=IPAddress.Parse("255.255.255.255"); //广播地址
  public int groupPort=2525;  //广播端口
  public string machineName;
  public string machineIP;
  public string romeName;
  public string romeIP;
  public string romeCon;
 
  private System.Windows.Forms.ListBox box;
  private System.Windows.Forms.Label label1;
  private System.Windows.Forms.Label label2;
  private System.Windows.Forms.Button button1;
  private System.Windows.Forms.Button button3;
  private System.Windows.Forms.Label label3;
  private System.Windows.Forms.TextBox t_rec;
  private System.Windows.Forms.TextBox t_send;
  private System.Windows.Forms.Button button2;
  private System.Windows.Forms.Button newmsg;
  /// <summary>
  /// 必需的设计器变量。
  /// </summary>
  private System.ComponentModel.Container components = null;

  public Form1()
  {
   //
   // Windows 窗体设计器支持所必需的
   //
   InitializeComponent();

   //
   // TODO: 在 InitializeComponent 调用后添加任何构造函数代码
   //
  }

  /// <summary>
  /// 清理所有正在使用的资源。
  /// </summary>
  protected override void Dispose( bool disposing )
  {
   if( disposing )
   {
    if (components != null)
    {
     components.Dispose();
    }
   }
   base.Dispose( disposing );
  }

  #region Windows 窗体设计器生成的代码
  /// <summary>
  /// 设计器支持所需的方法 - 不要使用代码编辑器修改
  /// 此方法的内容。
  /// </summary>
  private void InitializeComponent()
  {
   this.box = new System.Windows.Forms.ListBox();
   this.t_rec = new System.Windows.Forms.TextBox();
   this.label1 = new System.Windows.Forms.Label();
   this.label2 = new System.Windows.Forms.Label();
   this.t_send = new System.Windows.Forms.TextBox();
   this.button1 = new System.Windows.Forms.Button();
   this.button3 = new System.Windows.Forms.Button();
   this.label3 = new System.Windows.Forms.Label();
   this.button2 = new System.Windows.Forms.Button();
   this.newmsg = new System.Windows.Forms.Button();
   this.SuspendLayout();
   //
   // box
   //
   this.box.ItemHeight = 12;
   this.box.Location = new System.Drawing.Point(0, 32);
   this.box.Name = "box";
   this.box.Size = new System.Drawing.Size(200, 352);
   this.box.TabIndex = 0;
   //
   // t_rec
   //
   this.t_rec.BackColor = System.Drawing.SystemColors.InactiveBorder;
   this.t_rec.ForeColor = System.Drawing.Color.FromArgb(((System.Byte)(192)), ((System.Byte)(64)), ((System.Byte)(0)));
   this.t_rec.Location = new System.Drawing.Point(208, 56);
   this.t_rec.Multiline = true;
   this.t_rec.Name = "t_rec";
   this.t_rec.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
   this.t_rec.Size = new System.Drawing.Size(328, 136);
   this.t_rec.TabIndex = 1;
   this.t_rec.Text = "";
   //
   // label1
   //
   this.label1.Location = new System.Drawing.Point(208, 40);
   this.label1.Name = "label1";
   this.label1.Size = new System.Drawing.Size(120, 16);
   this.label1.TabIndex = 2;
   this.label1.Text = "接收:";
   //
   // label2
   //
   this.label2.Location = new System.Drawing.Point(208, 200);
   this.label2.Name = "label2";
   this.label2.Size = new System.Drawing.Size(120, 16);
   this.label2.TabIndex = 2;
   this.label2.Text = "发送:";
   //
   // t_send
   //
   this.t_send.Location = new System.Drawing.Point(208, 216);
   this.t_send.Multiline = true;
   this.t_send.Name = "t_send";
   this.t_send.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
   this.t_send.Size = new System.Drawing.Size(328, 112);
   this.t_send.TabIndex = 1;
   this.t_send.Text = "";
   //
   // button1
   //
   this.button1.Location = new System.Drawing.Point(440, 344);
   this.button1.Name = "button1";
   this.button1.Size = new System.Drawing.Size(75, 32);
   this.button1.TabIndex = 3;
   this.button1.Text = "发  送";
   this.button1.Click += new System.EventHandler(this.button1_Click);
   //
   // button3
   //
   this.button3.FlatStyle = System.Windows.Forms.FlatStyle.Popup;
   this.button3.Location = new System.Drawing.Point(88, 3);
   this.button3.Name = "button3";
   this.button3.Size = new System.Drawing.Size(56, 23);
   this.button3.TabIndex = 4;
   this.button3.Text = "刷 新";
   this.button3.Click += new System.EventHandler(this.button3_Click);
   //
   // label3
   //
   this.label3.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
   this.label3.ForeColor = System.Drawing.Color.Blue;
   this.label3.Location = new System.Drawing.Point(8, 8);
   this.label3.Name = "label3";
   this.label3.Size = new System.Drawing.Size(80, 16);
   this.label3.TabIndex = 5;
   this.label3.Text = "在线用户:";
   //
   // button2
   //
   this.button2.Location = new System.Drawing.Point(360, 344);
   this.button2.Name = "button2";
   this.button2.Size = new System.Drawing.Size(75, 32);
   this.button2.TabIndex = 6;
   this.button2.Text = "清  空";
   this.button2.Click += new System.EventHandler(this.button2_Click);
   //
   // newmsg
   //
   this.newmsg.Location = new System.Drawing.Point(208, 56);
   this.newmsg.Name = "newmsg";
   this.newmsg.Size = new System.Drawing.Size(328, 136);
   this.newmsg.TabIndex = 7;
   this.newmsg.Text = "有新消息了!";
   this.newmsg.Click += new System.EventHandler(this.newmsg_Click);
   //
   // Form1
   //
   this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
   this.ClientSize = new System.Drawing.Size(544, 389);
   this.Controls.Add(this.button2);
   this.Controls.Add(this.label3);
   this.Controls.Add(this.button3);
   this.Controls.Add(this.button1);
   this.Controls.Add(this.label1);
   this.Controls.Add(this.box);
   this.Controls.Add(this.label2);
   this.Controls.Add(this.t_send);
   this.Controls.Add(this.t_rec);
   this.Controls.Add(this.newmsg);
   this.Name = "Form1";
   this.Text = "小y";
   this.Closing += new System.ComponentModel.CancelEventHandler(this.Form1_Closing);
   this.Load += new System.EventHandler(this.Form1_Load);
   this.ResumeLayout(false);

  }
  #endregion

  /// <summary>
  /// 应用程序的主入口点。
  /// </summary>
  [STAThread]
  static void Main()
  {
   Application.Run(new Form1());
  }

  private void Form1_Load(object sender, System.EventArgs e)
  {
  
  
   End=new IPEndPoint(groupAddress,groupPort);
   //初始化计算机名和端口
   IPHostEntry myentry=Dns.GetHostByName(Dns.GetHostName());
   IPAddress myaddress=new IPAddress(myentry.AddressList[0].Address);
   machineName=Dns.GetHostName();
   machineIP=myaddress.ToString();

   box.Items.Add("IP            主机名");

   //开启监听线程
   runing=true;
   Thread myThread=new Thread(new ThreadStart(this.ListenPort));
   myThread.Start();

   //发送上线信息
   string sends="0&"+machineIP+"&"+machineName+"&"+machineIP;
   SendPack(sends);
  }

  //侦听指定端口的广播地址UDP包
  public void ListenPort()
  {
   IPEndPoint tempEnd=new IPEndPoint(IPAddress.Any,2525);
   while(runing)
   {
    Application.DoEvents();
    try
    {
     byte[] recb=listen.Receive(ref tempEnd);

     // 检查所接收到的信息
     checkMessage(recb);
    }
    catch(Exception e)
    {
     MessageBox.Show(e.Message.ToString());
     break;
    }
   
   }
   listen.Close();
   box.Items.Add("线程已经退出!");
   runing=false;
  }

  //循环接收包
  public void checkMessage(byte[] recbb)
  {
   string recStr=Encoding.Default.GetString(recbb);
   string[] rec=recStr.Split('&');
   switch(rec[0])
   {
    case "0": //刷新
     if(rec[3]==machineIP)
     {
      if(box.FindString(rec[1]+"  "+rec[2])<=0)
           box.Items.Add(rec[1]+"  "+rec[2]);
     }
     else  if(rec[1]==rec[3])
     {
      //从其他机器发送过来的刷新请求
      //返回自己的信息
      string sendstr="0&"+machineIP+"&"+machineName+"&"+rec[3];
      this.SendPack(sendstr);
      //如果不存在则添加该用户
      if(box.FindString(rec[1]+"  "+rec[2])<=0)
       box.Items.Add(rec[1]+"  "+rec[2]);
     }
     break;
    case "1": //发言
     if(rec[3]==machineIP)
     {
      romeName=rec[2];
      romeIP=rec[1];
      romeCon=rec[4];
      showNe();
     }
     break;
    case "2": //传文件
     break;
    case "9": //确认包
     if(rec[3]==machineIP)
      MessageBox.Show("信息来自:rec[2]("+rec[1]+")\r\n"+rec[4],"消息");
     break;
   }
  
  }
      
  //发送数据包到广播地址
  public void SendPack(string sendStr)
  {
  
   byte[] sendb=Encoding.Default.GetBytes(sendStr);
   try
   {
    listen.Send(sendb,sendb.Length,End);
   }
   catch(Exception e)
   {
    MessageBox.Show(e.Message.ToString());
   }
  }

  //刷新
  private void button3_Click(object sender, System.EventArgs e)
  {
   box.Items.Clear();
   box.Items.Add("IP            主机名");
   string temp2="0&"+machineIP+"&"+machineName+"&"+machineIP;
   this.SendPack(temp2);
  }

  //关闭循环
  private void Form1_Closing(object sender, System.ComponentModel.CancelEventArgs e)
  {
   runing=false;
   UdpClient mm=new UdpClient();
   IPEndPoint tempIPEnd=new IPEndPoint(IPAddress.Parse("127.0.0.1"),2525);
   string temps="0&0&0&0&0";
   byte[] sendb=Encoding.Default.GetBytes(temps);
   mm.Send(sendb,sendb.Length,tempIPEnd);
  }
  //发送
  private void button1_Click(object sender, System.EventArgs e)
  {
   if(t_send.Text==null)
   {
    MessageBox.Show("不能发送空信息!");
    return;
   }
   if(box.SelectedItem==null||box.SelectedIndex==0)
   {
    MessageBox.Show("请先选择一个用户!");
    return;
   }
   string send="1&"+machineIP+"&"+machineName+"&"+box.SelectedItem.ToString().Split(' ')[0]+"&"+t_send.Text;
   this.SendPack(send);
  }
  //清空
  private void button2_Click(object sender, System.EventArgs e)
  {
   t_send.Text=string.Empty;
   t_rec.Text=string.Empty;
  }
  //单击显示接收的信息并隐藏自身
  private void newmsg_Click(object sender, System.EventArgs e)
  {
   t_rec.Text="消息来自"+romeName+"("+romeIP+")"+DateTime.Now.ToShortDateString();
   t_rec.Text+="\r\n> "+romeCon;
   string back="9&"+machineIP+"&"+machineName+"&"+romeIP+"&信息被打开!";
   this.SendPack(back);
   newmsg.SendToBack();

  }
  //当有信息时显示提示按钮
  public void showNe()
  {
   //窗体显示
   if(this.WindowState!=FormWindowState.Normal)
   {
    this.Visible=true;
    this.WindowState=FormWindowState.Normal;
   }
   newmsg.BringToFront();
  }
 }
}

 

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